package com.atguigu.stuty.base;

import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 * @Author early morning
 * @Create 2025/4/22 21:04
 * @Description:
 */
public class SyncVSLockDemo {
    public synchronized void m1() {
        System.out.println(Thread.currentThread().getName() + "进来了");
        //暂停几秒钟线程
        try {
            TimeUnit.SECONDS.sleep(4);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    private final Lock lock = new ReentrantLock();

    public void m2() {
        if (lock.tryLock()) {
            try {
                System.out.println(Thread.currentThread().getName()  + "进来了");
                //暂停几秒钟线程
                try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedException e) { e.printStackTrace(); }
            } finally {
                lock.unlock();
            }
        } else {
            System.out.println(Thread.currentThread().getName() + "抢锁失败，请重试");
        }
    }

    public void m3() {
        try {
            if (lock.tryLock(2L,TimeUnit.SECONDS)) {
                try {
                    System.out.println(Thread.currentThread().getName() + "进来了");
                    //暂停几秒钟线程
                    try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); }
                } finally {
                    lock.unlock();
                }
            } else {
                System.out.println(Thread.currentThread().getName() + "超过2秒抢锁失败，请重试");
            }
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }

    public static void main(String[] args) {
        SyncVSLockDemo syncVSLockDemo = new SyncVSLockDemo();
        new Thread(() -> {
            syncVSLockDemo.m3();
        }, "张三").start();
        new Thread(() -> {
            syncVSLockDemo.m3();
        }, "李四").start();
    }
}
